﻿using Grand.Business.Core.Interfaces.Catalog.Categories;
using Grand.Business.Core.Interfaces.Catalog.Products;
using Grand.Business.Core.Interfaces.Checkout.Orders;
using Grand.Business.Core.Interfaces.Cms;
using Grand.Business.Core.Interfaces.Common.Directory;
using Grand.Domain.Orders;
using Grand.Infrastructure;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using System.Globalization;

namespace Widgets.GoogleAnalytics.Components;

[ViewComponent(Name = "WidgetsGoogleAnalytics")]
public class WidgetsGoogleAnalyticsViewComponent : ViewComponent
{
    private readonly ICookiePreference _cookiePreference;
    private readonly GoogleAnalyticsEcommerceSettings _googleAnalyticsEcommerceSettings;
    private readonly IHttpContextAccessor _httpContextAccessor;
    private readonly ILogger<WidgetsGoogleAnalyticsViewComponent> _logger;
    private readonly IWorkContextAccessor _workContextAccessor;

    public WidgetsGoogleAnalyticsViewComponent(IWorkContextAccessor workContextAccessor,
        ILogger<WidgetsGoogleAnalyticsViewComponent> logger,
        GoogleAnalyticsEcommerceSettings googleAnalyticsEcommerceSettings,
        ICookiePreference cookiePreference,
        IHttpContextAccessor httpContextAccessor)
    {
        _workContextAccessor = workContextAccessor;
        _logger = logger;
        _googleAnalyticsEcommerceSettings = googleAnalyticsEcommerceSettings;
        _cookiePreference = cookiePreference;
        _httpContextAccessor = httpContextAccessor;
    }

    public async Task<IViewComponentResult> InvokeAsync(string widgetZone, object additionalData = null)
    {
        var globalScript = "";

        if (_googleAnalyticsEcommerceSettings.AllowToDisableConsentCookie)
        {
            var enabled = await _cookiePreference.IsEnable(_workContextAccessor.WorkContext.CurrentCustomer, _workContextAccessor.WorkContext.CurrentStore,
                GoogleAnalyticDefaults.ConsentCookieSystemName);
            if ((enabled.HasValue && !enabled.Value) ||
                (!enabled.HasValue && !_googleAnalyticsEcommerceSettings.ConsentDefaultState))
                return Content("");
        }

        var routeData = Url.ActionContext.RouteData;
        try
        {
            var controller = routeData.Values["controller"];
            var action = routeData.Values["action"];

            if (controller == null || action == null)
                return Content("");

            //Special case, if we are in last step of checkout, we can use order total for conversion value
            if (controller.ToString()!.Equals("checkout", StringComparison.OrdinalIgnoreCase) &&
                action.ToString()!.Equals("completed", StringComparison.OrdinalIgnoreCase))
            {
                var lastOrder = await GetLastOrder();
                globalScript += await GetEcommerceScript(lastOrder);
            }
            else
            {
                globalScript += GetTrackingScript();
            }
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Error creating scripts for google ecommerce tracking");
        }

        return View("Default", globalScript);
    }

    private async Task<Order> GetLastOrder()
    {
        var orderService = _httpContextAccessor.HttpContext!.RequestServices.GetRequiredService<IOrderService>();
        var order = (await orderService.SearchOrders(_workContextAccessor.WorkContext.CurrentStore.Id,
            customerId: _workContextAccessor.WorkContext.CurrentCustomer.Id, pageSize: 1)).FirstOrDefault();
        return order;
    }

    private string GetTrackingScript()
    {
        var analyticsTrackingScript = _googleAnalyticsEcommerceSettings.TrackingScript + "\n";
        analyticsTrackingScript =
            analyticsTrackingScript.Replace("{GOOGLEID}", _googleAnalyticsEcommerceSettings.GoogleId);
        analyticsTrackingScript = analyticsTrackingScript.Replace("{ECOMMERCE}", "");
        return analyticsTrackingScript;
    }

    private async Task<string> GetEcommerceScript(Order order)
    {
        var usCulture = new CultureInfo("en-US");
        var analyticsTrackingScript = _googleAnalyticsEcommerceSettings.TrackingScript + "\n";
        analyticsTrackingScript =
            analyticsTrackingScript.Replace("{GOOGLEID}", _googleAnalyticsEcommerceSettings.GoogleId);

        if (order != null)
        {
            var countryService =
                _httpContextAccessor.HttpContext!.RequestServices.GetRequiredService<ICountryService>();
            var country = await countryService.GetCountryById(order.BillingAddress?.CountryId);
            var state = country?.StateProvinces.FirstOrDefault(x => x.Id == order.BillingAddress?.StateProvinceId);

            var analyticsEcommerceScript = _googleAnalyticsEcommerceSettings.EcommerceScript + "\n";
            analyticsEcommerceScript =
                analyticsEcommerceScript.Replace("{GOOGLEID}", _googleAnalyticsEcommerceSettings.GoogleId);
            analyticsEcommerceScript = analyticsEcommerceScript.Replace("{ORDERID}", order.Id);
            analyticsEcommerceScript =
                analyticsEcommerceScript.Replace("{TOTAL}", order.OrderTotal.ToString("0.00", usCulture));
            analyticsEcommerceScript = analyticsEcommerceScript.Replace("{CURRENCY}", order.CustomerCurrencyCode);
            analyticsEcommerceScript =
                analyticsEcommerceScript.Replace("{TAX}", order.OrderTax.ToString("0.00", usCulture));
            var orderShipping = _googleAnalyticsEcommerceSettings.IncludingTax
                ? order.OrderShippingInclTax
                : order.OrderShippingExclTax;
            analyticsEcommerceScript =
                analyticsEcommerceScript.Replace("{SHIP}", orderShipping.ToString("0.00", usCulture));
            analyticsEcommerceScript = analyticsEcommerceScript.Replace("{CITY}",
                order.BillingAddress == null ? "" : FixIllegalJavaScriptChars(order.BillingAddress.City));
            analyticsEcommerceScript = analyticsEcommerceScript.Replace("{STATEPROVINCE}",
                order.BillingAddress == null || string.IsNullOrEmpty(order.BillingAddress.StateProvinceId)
                    ? ""
                    : FixIllegalJavaScriptChars(state?.Name));
            analyticsEcommerceScript = analyticsEcommerceScript.Replace("{COUNTRY}",
                order.BillingAddress == null || string.IsNullOrEmpty(order.BillingAddress.CountryId)
                    ? ""
                    : FixIllegalJavaScriptChars(country?.Name));

            var sb = new StringBuilder();

            var productService =
                _httpContextAccessor.HttpContext!.RequestServices.GetRequiredService<IProductService>();
            var categoryService =
                _httpContextAccessor.HttpContext!.RequestServices.GetRequiredService<ICategoryService>();

            foreach (var item in order.OrderItems)
            {
                var product = await productService.GetProductById(item.ProductId);
                var analyticsEcommerceDetailScript = _googleAnalyticsEcommerceSettings.EcommerceDetailScript;
                //get category
                var category = "";
                if (product.ProductCategories.Any())
                {
                    var defaultProductCategory =
                        await categoryService.GetCategoryById(product.ProductCategories.MinBy(x => x.DisplayOrder)
                            .CategoryId);
                    if (defaultProductCategory != null)
                        category = defaultProductCategory.Name;
                }

                analyticsEcommerceDetailScript = analyticsEcommerceDetailScript.Replace("{ORDERID}", order.Id);
                //The SKU code is a required parameter for every item that is added to the transaction
                analyticsEcommerceDetailScript =
                    analyticsEcommerceDetailScript.Replace("{PRODUCTSKU}", FixIllegalJavaScriptChars(item.Sku));
                analyticsEcommerceDetailScript =
                    analyticsEcommerceDetailScript.Replace("{PRODUCTID}", FixIllegalJavaScriptChars(item.ProductId));
                analyticsEcommerceDetailScript =
                    analyticsEcommerceDetailScript.Replace("{PRODUCTNAME}", FixIllegalJavaScriptChars(product.Name));
                analyticsEcommerceDetailScript =
                    analyticsEcommerceDetailScript.Replace("{CATEGORYNAME}", FixIllegalJavaScriptChars(category));
                var unitPrice = _googleAnalyticsEcommerceSettings.IncludingTax
                    ? item.UnitPriceInclTax
                    : item.UnitPriceExclTax;
                analyticsEcommerceDetailScript =
                    analyticsEcommerceDetailScript.Replace("{UNITPRICE}", unitPrice.ToString("0.00", usCulture));
                analyticsEcommerceDetailScript =
                    analyticsEcommerceDetailScript.Replace("{QUANTITY}", item.Quantity.ToString());
                sb.AppendLine(analyticsEcommerceDetailScript);
            }

            analyticsEcommerceScript = analyticsEcommerceScript.Replace("{DETAILS}", sb.ToString());

            analyticsTrackingScript = analyticsTrackingScript.Replace("{ECOMMERCE}", analyticsEcommerceScript);
        }

        return analyticsTrackingScript;
    }

    private string FixIllegalJavaScriptChars(string text)
    {
        if (string.IsNullOrEmpty(text))
            return text;

        //replace ' with \' (http://stackoverflow.com/questions/4292761/need-to-url-encode-labels-when-tracking-events-with-google-analytics)
        text = text.Replace("'", "\\'");
        return text;
    }
}